<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片试图区域 -->
    <el-card>
      <!-- 添加角色按钮区域 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="addDialogVisible = true"
            >添加角色</el-button
          >
        </el-col>
      </el-row>

      <!-- 角色列表区域 -->
      <el-table :data="roleList" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              :class="['bdbottom', 'vcenter', i1 === 0 ? 'bdtop' : '']"
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row, item1.id)">
                  {{ item1.authName }}
                </el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过for循环嵌套 渲染二级权限 -->
                <el-row
                  :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']"
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                >
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightById(scope.row, item2.id)"
                    >
                      {{ item2.authName }}
                    </el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      v-for="(item3, i3) in item2.children"
                      :key="item3.id"
                      closable
                      @close="removeRightById(scope.row, item3.id)"
                      >{{ item3.authName }}</el-tag
                    >
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
            <!-- <pre>
            {{ scope.row }}
            </pre> -->
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index" align="center"></el-table-column>
        <el-table-column
          label="角色名称"
          prop="roleName"
          align="center"
        ></el-table-column>
        <el-table-column
          label="角色描述"
          prop="roleDesc"
          align="center"
        ></el-table-column>
        <el-table-column label="操作" align="center" width="300px">
          <template slot-scope="scope">
            <el-button
              size="mini"
              type="primary"
              icon="el-icon-edit"
              @click="showEditDialog(scope.row.id)"
              >编辑</el-button
            ><el-button
              size="mini"
              type="danger"
              icon="el-icon-delete"
              @click="removeRoleById(scope.row.id)"
              >删除</el-button
            ><el-button
              type="warning"
              size="mini"
              icon="el-icon-setting"
              @click="showSetRightDialog(scope.row)"
              >分配权限</el-button
            >
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 添加角色的对话框 -->
    <el-dialog
      title="添加角色"
      :visible.sync="addDialogVisible"
      width="50%"
      @close="addDialogClosed"
    >
      <!-- 内容主题区域 -->
      <el-form
        :model="addRoleForm"
        :rules="addRoleFormRules"
        ref="addRoleFormRef"
        label-width="100px"
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addRoleForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addRoleForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部按钮区域 -->

      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRole">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 修改用户的对话框 -->
    <el-dialog
      title="修改用户"
      :visible.sync="editDialogVisible"
      width="50%"
      @close="editRoleDialogClosed"
    >
      <el-form
        :model="editRoleForm"
        :rules="editRoleFormRules"
        ref="editRoleFormRef"
        label-width="80px"
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="editRoleForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editRoleForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editRoleInfo">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 分配权限的对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialogClosed"
    >
      <!-- 树形控件  新学习组件 -->
      <el-tree
        :data="rightsList"
        :props="treeProps"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defKeys"
        ref="treeRef"
      ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 所有角色列表数据
      roleList: [],
      addDialogVisible: false,
      addRoleForm: {},
      addRoleFormRules: {
        roleName: [
          {
            required: true,
            message: '请输入角色名',
            trigger: 'blur',
          },
          {
            min: 3,
            max: 8,
            message: '角色名的长度在3-8个字符之间',
            trigger: 'blur',
          },
        ],
        roleDesc: [
          {
            required: true,
            message: '请输入角色描述',
            trigger: 'blur',
          },
          {
            min: 3,
            max: 20,
            message: '角色名的长度在3-20个字符之间',
            trigger: 'blur',
          },
        ],
      },
      editDialogVisible: false,
      editRoleForm: {},
      editRoleFormRules: {
        roleDesc: [
          {
            required: true,
            message: '请输入角色描述',
            trigger: 'blur',
          },
          {
            min: 3,
            max: 20,
            message: '角色名的长度在3-20个字符之间',
            trigger: 'blur',
          },
        ],
        roleName: [
          {
            required: true,
            message: '请输入角色名',
            trigger: 'blur',
          },
          {
            min: 3,
            max: 8,
            message: '角色名的长度在3-8个字符之间',
            trigger: 'blur',
          },
        ],
      },
      // 控制分配权限对话框的显示与隐藏
      setRightDialogVisible: false,
      // 所有权限的数据
      rightsList: [],
      // 树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children',
      },
      // 默认选中的节点Id值数组
      defKeys: [],
      // 当前即将分配权限的角色ID
      roleId:''
    }
  },
  created() {
    this.getRolesList()
  },
  methods: {
    // 获取所有角色列表数据
    async getRolesList() {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) return this.$message('获取角色列表数据失败!')
      this.roleList = res.data
      // console.log(this.roleList)
    },

    // 监听添加用户对话框的关闭事件
    addDialogClosed() {
      this.$refs.addRoleFormRef.resetFields()
      // console.log(this)
    },

    //添加角色确定按钮
    addRole() {
      this.$refs.addRoleFormRef.validate(async (valid) => {
        // console.log(valid)
        if (!valid) return
        // // 可以发起添加角色的网络请求
        const { data: res } = await this.$http.post('roles', this.addRoleForm)
        if (res.meta.status !== 201) return this.$message.error('添加角色失败')
        this.$message.success('添加角色成功')
        // 隐藏对话框
        this.addDialogVisible = false
        //  重新获取列表
        this.getRolesList()
      })
    },

    // 显示隐藏修改角色信息对话框
    async showEditDialog(id) {
      // console.log(id)
      this.editDialogVisible = true
      const { data: res } = await this.$http.get('roles/' + id)
      if (res.meta.status != 200) return this.$message.error('查询信息失败')

      // 展示编辑角色的对话框
      this.editRoleForm = res.data
      // console.log(this.editRoleForm)
      // this.$message.success('查询成功')
    },

    // 监听修改角色对话框关闭事件
    editRoleDialogClosed() {
      this.$refs.editRoleFormRef.resetFields()
    },

    // 修改用户数据确定按钮 提交
    editRoleInfo() {
      this.$refs.editRoleFormRef.validate(async (valid) => {
        //  console.log(valid)
        if (!valid) return
        // console.log(this.editRoleForm)
        // 发起修改用户信息的数据请求
        const { data: res } = await this.$http.put(
          'roles/' + this.editRoleForm.roleId,
          {
            roleName: this.editRoleForm.roleName,
            roleDesc: this.editRoleForm.roleDesc,
          }
        )
        if (res.meta.status !== 200)
          return this.$message.error('更新角色信息失败')
        // 关闭对话框
        this.editDialogVisible = false
        // 刷新数据列表
        this.getRolesList()
        // 提示成功
        this.$message.success('角色信息更新成功！')
      })
    },

    //
    async removeRoleById(id) {
      // console.log(id)
      // 弹框提示用户是否删除
      const confirmResult = await this.$confirm(
        '此操作将永久删除该用户, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning',
        }
      ).catch((err) => err)

      // 如果用户确认删除，则返回字符串 confirm
      // 如果用户取消删除，则返回值为字符串 cancel
      // console.log(confirmResult)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }

      const { data: res } = await this.$http.delete('roles/' + id)
      if (res.meta.status !== 200)
        return this.$message.error('删除角色信息失败')

      // 提示
      this.$message.success('删除成功')
      // 刷新数据列表
      this.getRolesList()
    },

    //根据ID删除对应的权限
    async removeRightById(role, rightId) {
      // 弹框提示是否删除
      const confirmResult = await this.$confirm(
        '此操作将永久删除该文件, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning',
        }
      ).catch((err) => err)

      if (confirmResult !== 'confirm') return this.$message.info('取消了删除')

      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      )
      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败')
      }
      // this.getRolesList()
      role.children = res.data
    },

    // 展示分配权限的对话框
    async showSetRightDialog(role) {
      this.roleId = role.id
      // 获取所有权限的数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限数据失败')
      }

      // 获取到的权限数据保存到 data 中
      this.rightsList = res.data
      // console.log(this.rightsList)

      // 递归获取三级节点的 Id
      this.getLeafKeys(role, this.defKeys)

      this.setRightDialogVisible = true
    },

    // 通过递归的形式 获取角色下所有三级权限的id，并保存到 defkeys 数组中
    getLeafKeys(node, arr) {
      // 如果当前 node 节点不包含children 属性则是三级节点
      // console.log('node', node)
      if (!node.children) {
        return arr.push(node.id)
      }
      // console.log(node.children, 'children')
      node.children.forEach((item) => this.getLeafKeys(item, arr))
    },

    // 监听分配权限对话框的关闭事件
    setRightDialogClosed() {
      this.defKeys = []
    },

    // 点击为角色分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys(),
      ]

      // console.log(keys)
      const idStr = keys.join(',')
      const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids: idStr})

      if(res.meta.status !== 200) {
        return this.$message.error('分配权限失败!')
      }
      this.$message.success('分配权限成功!')
      this.getRolesList()
      this.setRightDialogVisible = false
    },
  },
}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
  // margin-left: 50px;
}
.el-row {
  padding-left: 50px;
}
.bdtop {
  border-top: 1px solid #eee;
}

.bdbottom {
  border-bottom: 1px solid #eee;
}

.vcenter {
  display: flex;
  align-items: center;
}
</style>
